Just keep in mind, this really shouldnt be done like some garden variety lawn furniture. That said, simple sanding and spray painting will most likely look just like that.... a spray paint job done in your back yard. Just my $.02.
The only suggestions I can make are based on professional use since I have the equipment (compressor, gravity feed gun, paint mixer, etc). I would just listen to what Dub said and sand it down, clean it up WELL, and spray paint it. No real knowledge of can spray paint, but I would get something that can at least hold up to the elements (so you don't end up repeating this process every summer).
Gary Noonan
'01 S/C VX / '18 Forester XT